title: Aggressive rheumatoid arthritis registry in Italy. Characteristics of the early rheumatoid arthritis subtype among patients classified according to the ACR criteria.
mesh_terms: D000328:Adult; D017677:Age Distribution; D000368:Aged; D001172:Arthritis, Rheumatoid / Q000145:classification* / Q000175:diagnosis / Q000453:epidemiology*; D018450:Disease Progression; D005260:Female; D006801:Humans; D015994:Incidence; D007558:Italy / Q000453:epidemiology; D008297:Male; D008875:Middle Aged; D010147:Pain Measurement; D011379:Prognosis; D016059:Range of Motion, Articular / Q000502:physiology; D012042:Registries; D012307:Risk Factors; D012720:Severity of Illness Index; D017678:Sex Distribution